Friedrichsruh is a district in the municipality of Aumühle, Herzogtum Lauenburg district, Schleswig-Holstein, northern Germany. It is the site of the Bismarck Mausoleum.After the victory over France and the establishment, in 1871, of the German Empire, Otto von Bismarck received the Sachsenwald as a present from Emperor William I. Bismarck had a manor house built on the site of an inn, which Frederick Charles Augustus, sovereign count of Lippe-Biesterfeld, had originally founded as his hunting lodge in 1763, named after him Friedrichsruh . The manor house is positioned in the forest, directly beside the Hamburg-Berlin railway line, and Bismarck retained the name of Friedrichsruh. Some of his descendants still live there.